Optical dimming of RW Aur associated with an iron rich corona and exceptionally high absorbing column density

Hans Moritz Günther, T. Birnstiel, D. P. Huenemoerder +7

RW Aur is a binary system composed of two young, low-mass stars. The primary, RW Aur A, has undergone visual dimming events ($\Delta V=2-3$~mag) in 2011, 2014-16, and 2017-2018. Visual…